346 Area Code: Houston, Texas

Texas's 346 area code is an overlay sharing geography with the long-running 281 and 713 across metropolitan Houston. Houston anchors the directory's records here. The city sits on the flat coastal plain of southeastern Texas, organized around the surrounding ring of refineries, petrochemical operations, and a substantial concentration of medical, energy, and aerospace employment. The 346 designation, part of the North American Numbering Plan, has been filling with allocations as the broader Houston metropolitan area's number demand has continued to grow past what the older codes alone could support.

In records the directory has compiled for 346 numbers, other Texas cities — Abilene, Austin, Beaumont, and College Station — appear regularly. None of those are inside the 346 footprint. The pattern reflects standard public-record dynamics across Texas. The directory currently documents 252 distinct prefixes within 346 in detail, a working subset of the prefix population the code carries.

Houston's home values come in close to the US median, with median household income running below the national figure but not severely so. The city's median age sits a few years under the US reading, and population places Houston among the largest cities in the country. The 346 footprint shares those demographics with 281 and 713 because all three codes serve metropolitan Houston in overlapping form, and the broader region's economic and demographic profile reflects the city's role as a major energy, medical, aerospace, and port-trade center for the broader Gulf Coast.